<?php
/*
 * Copyright 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * This class defines attributes, valid values, and usage which is generated from
 * a given json schema. http://tools.ietf.org/html/draft-zyp-json-schema-03#section-5
 *
 * @author Chirag Shah <chirags@google.com>
 *
 */
class Google_Model
{
    public function __construct(/* polymorphic */)
    {
        if (func_num_args() == 1 && is_array(func_get_arg(0))) {
            // Initialize the model with the array's contents.
      $array = func_get_arg(0);
            $this->mapTypes($array);
        }
    }
  /**
   * Initialize this object's properties from an array.
   *
   * @param array $array Used to seed this object's properties.
   */
  protected function mapTypes($array)
  {
      foreach ($array as $key => $val) {
          $this->$key = $val;
          $keyTypeName = "__$key".'Type';
          $keyDataType = "__$key".'DataType';
          if ($this->useObjects() && property_exists($this, $keyTypeName)) {
              if ($this->isAssociativeArray($val)) {
                  if (isset($this->$keyDataType) && 'map' == $this->$keyDataType) {
                      foreach ($val as $arrayKey => $arrayItem) {
                          $val[$arrayKey] = $this->createObjectFromName($keyTypeName, $arrayItem);
                      }
                      $this->$key = $val;
                  } else {
                      $this->$key = $this->createObjectFromName($keyTypeName, $val);
                  }
              } elseif (is_array($val)) {
                  $arrayObject = array();
                  foreach ($val as $arrayIndex => $arrayItem) {
                      $arrayObject[$arrayIndex] = $this->createObjectFromName($keyTypeName, $arrayItem);
                  }
                  $this->$key = $arrayObject;
              }
          }
      }
  }
  /**
   * Returns true only if the array is associative.
   * @param array $array
   * @return bool True if the array is associative.
   */
  protected function isAssociativeArray($array)
  {
      if (!is_array($array)) {
          return false;
      }
      $keys = array_keys($array);
      foreach ($keys as $key) {
          if (is_string($key)) {
              return true;
          }
      }

      return false;
  }
  /**
   * Given a variable name, discover its type.
   *
   * @param $name
   * @param $item
   * @return object The object from the item.
   */
  private function createObjectFromName($name, $item)
  {
      $type = $this->$name;

      return new $type($item);
  }
    protected function useObjects()
    {
        global $apiConfig;

        return isset($apiConfig['use_objects']) && $apiConfig['use_objects'];
    }
  /**
   * Verify if $obj is an array.
   * @throws Google_Exception Thrown if $obj isn't an array.
   * @param array $obj Items that should be validated.
   * @param string $type Array items should be of this type.
   * @param string $method Method expecting an array as an argument.
   */
  public function assertIsArray($obj, $type, $method)
  {
      if ($obj && !is_array($obj)) {
          throw new Google_Exception("Incorrect parameter type passed to $method(), expected an"
          ." array containing items of type $type.");
      }
  }
}
